Trial courts of general and limited jurisdiction, as well as courts of review, exist in the several states, all created on the same general plan, as provided by the constitutions and statutes of the respective states, and likewise of the government of the United States. Justices of the peace and magistrate courts are the most inferior, being extremely limited in their jurisdiction. The trial courts of general jurisdiction are generally authorized and empowered to empanel grand juries and try all grades of criminal causes. In Illinois, for instance, each county has a circuit court of general jurisdiction, including criminal causes; and each of these courts is therefore authorized and empowered to organize a grand jury - except Cook County, in which a criminal court of general jurisdiction exists, having been created under a special provision of the constitution, and it is authorized to empanel a grand jury in that county instead of the circuit court.

21 Hughes' Cr. Law, Sec. 2696;

Com. vs. Green, 126 Pa. St., 531. 22 Brotherton vs. People, 75 N. Y., 159; Aylesworth vs. People, 65 Ill., 302; Sullivan vs. People, 156 Ill., 95. 23 Kelly vs. State, 39 Ill., 158; Epps vs. State, 102 Ind., 539.